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Pier-En PoRTors, or SAN FRANCISCO, CALIFORNIA.

i Letters Patent No. 94,972, dated September 21, 1869.

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.The Schedule referred to in these Letters Patent and making part oi the same.

To all whom it may concern;

Beit known that I, PETER PoRTois', of the'city and county of San Francisco, in the State of California, h ve invented a new and improved Mode of Constructing Earthquake and Fire-Proof Chimneys; and I hereby declare thatvthe following is "a full and exact description thereof, reference being had to the accom- 'panying drawingsfand t6 the v,letters of reference Y marked thereon.

The nature of. my invention consists in galvanized iron or copper lues or tubes, enclosed in a wooden box or frame-work, filled in, between the fines and framework, with pieces oi' brick and clay, as shown on the ground and section and elevation plan of the drawings.

` To enable others skilled in the art to make and use my invention@ proceed to describe its construction and operation.

4 I make the iron or copper fines or'tnbes'of c0411- venient 'lengthr and circumference, and insert one into the other, so as to give a proper length to the chimney, as shown onthe section-plan byletter A.

I enclose these ues in a wooden box or frame-work, as shown on the section, ground, and elevation-plan, by letter B. I.

I fill in the space between the frame-work and the lues with broken bricks, or clay, marked lett-er C on the plans. Y y

The differentframe-works, with the lines and filling-in, put and fastened the one upon theother, with clay between thev joints, and securely fastened with iron fastenings `to the uprightlstuddings of the building, make the length andbody ofthe chimney.

, I then free the Whole, so as to receive the inside nish,corresponding with the inside finish of the house.

On the different floors where it is convenient or necessary to inserta stove-pipe, I make an opening to the flue, surrounded..with clay, as shown on the section and elevation-plan' by letter D. t Such opening y p is made of iron or copper, fastened to the ue.

The outside portion of the chimney, marked .by letter E, is finished in an ornamented style, and securely i fastened to the` inside chimneyy by iron fastenings, marked on the plan by letter F.

The plans are shown'with two fines, but the chimney can-be madewith one, as shown by `Figure 1, or any larger number. t v

A chimney made in this way will not crock by the shaking of the lbuilding by an earthquake,or any other cause, and will not expose the building to the damage oi'ire from any defects in it. g

The top of the chimney is to be covered with a plate of iron, having openings for the iiues.

I claim las my linvention, and desire to secure by Letters Patent- The chimney, consisting of the galvanized iron or copper, or other metallic tubes' or ilues, vsurrounded by the lconoretion C, composed of clay and broken bricks, or their equivalents, the whole enclosed in the wooden box or frame-work B, all substantially in the manner and for the purposes set forth.

PETER Pon'rois.

Witnesses:

F. A. FABnNs, J. H. BLOOD. 

